-I'd argue for the Nikon FM3a - its hybrid shutter control makes it both a fully mechanical camera not reliant on batteries to do its thing AND a modern AE-equipped, electronic shutter control MF camera.

That aside, the build quality is terrific, handling is great and the built-in center-weighted meter works very well.

Yup, the FM3a is likely to become a classic somewhere down the line. (I guess one can argue that it already IS a classic, albeit a very recent one!)